gcc/genmultilib

   1 #!/bin/sh
   2 # Generates multilib.h.
   3 #   Copyright (C) 1994, 1995 Free Software Foundation, Inc.
   4
   5 #This file is part of GNU CC.
   6
   7 #GNU CC is free software; you can redistribute it and/or modify
   8 #it under the terms of the GNU General Public License as published by
   9 #the Free Software Foundation; either version 2, or (at your option)
  10 #any later version.
  11
  12 #GNU CC is distributed in the hope that it will be useful,
  13 #but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 #GNU General Public License for more details.
  16
  17 #You should have received a copy of the GNU General Public License
  18 #along with GNU CC; see the file COPYING.  If not, write to
  19 #the Free Software Foundation, 59 Temple Place - Suite 330,
  20 #Boston, MA 02111-1307, USA.
  21
  22 # This shell script produces a header file which the gcc driver
  23 # program uses to pick which library to use based on the machine
  24 # specific options that it is given.
  25
  26 # The first argument is a list of sets of options.  The elements in
  27 # the list are separated by spaces.  Within an element, the options
  28 # are separated by slashes.  No leading dash is used on the options.
  29 # Each option in a set is mutually incompatible with all other options
  30 # in the set.
  31
  32 # The optional second argument is a list of subdirectory names.  If
  33 # the second argument is non-empty, there must be as many elements in
  34 # the second argument as there are options in the first argument.  The
  35 # elements in the second list are separated by spaces.  If the second
  36 # argument is empty, the option names will be used as the directory
  37 # names.
  38
  39 # The optional third argument is a list of options which are
  40 # identical.  The elements in the list are separated by spaces.  Each
  41 # element must be of the form OPTION=OPTION.  The first OPTION should
  42 # appear in the first argument, and the second should be a synonym for
  43 # it.  Question marks are replaced with equal signs in both options.
  44
  45 # The optional fourth argument is a list of multilib directory
  46 # combinations that should not be built.
  47
  48 # The output looks like
  49 #   #define MULTILIB_MATCHES "\
  50 #   SUBDIRECTORY OPTIONS;\
  51 #   ...
  52 #   "
  53 # The SUBDIRECTORY is the subdirectory to use.  The OPTIONS are
  54 # multiple options separated by spaces.  Each option may start with an
  55 # exclamation point.  gcc will consider each line in turn.  If none of
  56 # the options beginning with an exclamation point are present, and all
  57 # of the other options are present, that subdirectory will be used.
  58 # The order of the subdirectories is such that they can be created in
  59 # order; that is, a subdirectory is preceded by all its parents.
  60
  61 # Here is a example (this is simplified from the actual 680x0 case):
  62 #   genmultilib "m68000/m68020 msoft-float" "m68000 m68020 msoft-float"
  63 #               "m68000=mc68000"
  64 # This produces:
  65 #   ". !m68000 !mc68000 !m68020 !msoft-float;",
  66 #   "m68000 m68000 !m68020 !msoft-float;",
  67 #   "m68000 mc60000 !m68020 !msoft-float;",
  68 #   "m68020 !m68000 !mc68000 m68020 !msoft-float;",
  69 #   "msoft-float !m68000 !mc68000 !m68020 msoft-float;",
  70 #   "m68000/msoft-float m68000 !m68020 msoft-float;",
  71 #   "m68000/msoft-float mc68000 !m68020 msoft-float;",
  72 #   "m68020/msoft-float !m68000 !mc68000 m68020 msoft-float;",
  73 #
  74 # The effect is that `gcc -msoft-float' (for example) will append
  75 # msoft-float to the directory name when searching for libraries or
  76 # startup files, and `gcc -m68000 -msoft-float' (for example) will
  77 # append m68000/msoft-float.
  78
  79 # Copy the positional parameters into variables.
  80 options=$1
  81 dirnames=$2
  82 matches=$3
  83 exceptions=$4
  84
  85 # What we want to do is select all combinations of the sets in
  86 # options.  Each combination which includes a set of mutually
  87 # exclusive options must then be output multiple times, once for each
  88 # item in the set.  Selecting combinations is a recursive process.
  89 # Since not all versions of sh support functions, we achieve recursion
  90 # by creating a temporary shell script which invokes itself.
  91 rm -f tmpmultilib
  92 cat >tmpmultilib <<\EOF
  93 #!/bin/sh
  94 # This recursive script basically outputs all combinations of its
  95 # input arguments, handling mutually exclusive sets of options by
  96 # repetition.  When the script is called, ${initial} is the list of
  97 # options which should appear before all combinations this will
  98 # output.  The output looks like a list of subdirectory names with
  99 # leading and trailing slashes.
 100 if [ "$#" != "0" ]; then
 101   first=$1
 102   shift
 103   for opt in `echo $first | sed -e 's|/| |'g`; do
 104     echo ${initial}${opt}/
 105   done
 106   ./tmpmultilib $@
 107   for opt in `echo $first | sed -e 's|/| |'g`; do
 108     initial="${initial}${opt}/" ./tmpmultilib $@
 109   done
 110 fi
 111 EOF
 112 chmod +x tmpmultilib
 113
 114 combinations=`initial=/ ./tmpmultilib ${options}`
 115
 116 rm -f tmpmultilib
 117
 118 # If there exceptions, weed them out now
 119 if [ -n "${exceptions}" ]; then
 120   rm -f tmpmultilib2
 121   cat >tmpmultilib2 <<\EOF
 122 #!/bin/sh
 123 # This recursive script weeds out any combination of multilib
 124 # switches that should not be generated.  The output looks like
 125 # a list of subdirectory names with leading and trailing slashes.
 126
 127   for opt in $@; do
 128     case "$opt" in
 129 EOF
 130
 131   for except in ${exceptions}; do
 132     echo "      /${except}/) : ;;" >> tmpmultilib2
 133   done
 134
 135 cat >>tmpmultilib2 <<\EOF
 136       *) echo ${opt};;
 137     esac
 138   done
 139 EOF
 140   chmod +x tmpmultilib2
 141   combinations=`./tmpmultilib2 ${combinations}`
 142   rm -f ./tmpmultilib2
 143 fi
 144
 145 # Construct a sed pattern which will convert option names to directory
 146 # names.
 147 todirnames=
 148 if [ -n "${dirnames}" ]; then
 149   set x ${dirnames}
 150   shift
 151   for set in ${options}; do
 152     for opt in `echo ${set} | sed -e 's|/| |'g`; do
 153       if [ "$1" != "${opt}" ]; then
 154         todirnames="${todirnames} -e s|/${opt}/|/${1}/|g"
 155       fi
 156       shift
 157     done
 158   done
 159 fi
 160
 161 # Construct a sed pattern which will add negations based on the
 162 # matches.  The semicolons are easier than getting the shell to accept
 163 # quoted spaces when expanding a variable.
 164 matchnegations=
 165 for i in ${matches}; do
 166   l=`echo $i | sed -e 's/=.*$//' -e 's/?/=/g'`
 167   r=`echo $i | sed -e 's/^.*=//' -e 's/?/=/g'`
 168   matchnegations="${matchnegations} -e s/;!${l};/;!${l};!${r};/"
 169 done
 170
 171 # We need another recursive shell script to correctly handle positive
 172 # matches.  If we are invoked as
 173 #   genmultilib "opt1 opt2" "" "opt1=nopt1 opt2=nopt2"
 174 # we must output
 175 #   opt1/opt2 opt1 opt2
 176 #   opt1/opt2 nopt1 opt2
 177 #   opt1/opt2 opt1 nopt2
 178 #   opt1/opt2 nopt1 nopt2
 179 # In other words, we must output all combinations of matches.
 180 rm -f tmpmultilib2
 181 cat >tmpmultilib2 <<\EOF
 182 #!/bin/sh
 183 # The positional parameters are a list of matches to consider.
 184 # ${dirout} is the directory name and ${optout} is the current list of
 185 # options.
 186 if [ "$#" = "0" ]; then
 187   echo "\"${dirout} ${optout};\","
 188 else
 189   first=$1
 190   shift
 191   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 $@
 192   l=`echo ${first} | sed -e 's/=.*$//' -e 's/?/=/g'`
 193   r=`echo ${first} | sed -e 's/^.*=//' -e 's/?/=/g'`
 194   if expr " ${optout} " : ".* ${l} .*" > /dev/null; then
 195     newopt=`echo " ${optout} " | sed -e "s/ ${l} / ${r} /" -e 's/^ //' -e 's/ $//'`
 196     dirout="${dirout}" optout="${newopt}" ./tmpmultilib2 $@
 197   fi
 198 fi
 199 EOF
 200 chmod +x tmpmultilib2
 201
 202 # Start with the current directory, which includes only negations.
 203 optout=
 204 for set in ${options}; do
 205   for opt in `echo ${set} | sed -e 's|/| |'g`; do
 206     optout="${optout} !${opt}"
 207   done
 208 done
 209 optout=`echo ${optout} | sed -e 's/^ //'`
 210 if [ -n "${matchnegations}" ]; then
 211   optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'`
 212 fi
 213 echo "\". ${optout};\","
 214
 215 # Work over the list of combinations.  We have to translate each one
 216 # to use the directory names rather than the option names, we have to
 217 # include the information in matches, and we have to generate the
 218 # correct list of options and negations.
 219 for combo in ${combinations}; do
 220   # Use the directory names rather than the option names.
 221   if [ -n "${todirnames}" ]; then
 222     dirout=`echo ${combo} | sed ${todirnames}`
 223   else
 224     dirout=${combo}
 225   fi
 226   # Remove the leading and trailing slashes.
 227   dirout=`echo ${dirout} | sed -e 's|^/||' -e 's|/$||g'`
 228
 229   # Look through the options.  We must output each option that is
 230   # present, and negate each option that is not present.
 231   optout=
 232   for set in ${options}; do
 233     setopts=`echo ${set} | sed -e 's|/| |g'`
 234     for opt in ${setopts}; do
 235       if expr "${combo} " : ".*/${opt}/.*" > /dev/null; then
 236         optout="${optout} ${opt}"
 237       else
 238         optout="${optout} !${opt}"
 239       fi
 240     done
 241   done
 242   optout=`echo ${optout} | sed -e 's/^ //'`
 243
 244   # Add any negations of matches.
 245   if [ -n "${matchnegations}" ]; then
 246     optout=`echo ";${optout};" | sed -e 's/ /;/g' ${matchnegations} -e 's/^;//' -e 's/;$//' -e 's/;/ /g'`
 247   fi
 248
 249   # Output the line with all appropriate matches.
 250   dirout="${dirout}" optout="${optout}" ./tmpmultilib2 ${matches}
 251 done
 252
 253 # Terminate the list of string.
 254 echo "NULL"
 255
 256 rm -f tmpmultilib2
 257
 258 exit 0